1011212002121 has 4 divisors (see below), whose sum is σ = 1021224002244. Its totient is φ = 1001200002000.

The previous prime is 1011212002117. The next prime is 1011212002123. The reversal of 1011212002121 is 1212002121101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 566009456896 + 445202545225 = 752336^2 + 667235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011212002121 - 2² = 1011212002117 is a prime.

It is a super-2 number, since 2×1011212002121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011212002096 and 1011212002105.

It is not an unprimeable number, because it can be changed into a prime (1011212002123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005999910 + ... + 5006000111.

It is an arithmetic number, because the mean of its divisors is an integer number (255306000561).

Almost surely, 2^{1011212002121} is an apocalyptic number.

It is an amenable number.

1011212002121 is a deficient number, since it is larger than the sum of its proper divisors (10012000123).

1011212002121 is a wasteful number, since it uses less digits than its factorization.

1011212002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10012000122.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1011212002121 its reverse (1212002121101), we get a palindrome (2223214123222).

It can be divided in two parts, 101 and 1212002121, that multiplied together give a palindrome (122412214221).

The spelling of 1011212002121 in words is "one trillion, eleven billion, two hundred twelve million, two thousand, one hundred twenty-one".