1212110011021 has 8 divisors (see below), whose sum is σ = 1491827705984. Its totient is φ = 959032096560.

The previous prime is 1212110011009. The next prime is 1212110011039. The reversal of 1212110011021 is 1201100112121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212110011021 - 2⁵ = 1212110010989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1212110010992 and 1212110011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212110014021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6659945025 + ... + 6659945206.

It is an arithmetic number, because the mean of its divisors is an integer number (186478463248).

Almost surely, 2^{1212110011021} is an apocalyptic number.

It is an amenable number.

1212110011021 is a deficient number, since it is larger than the sum of its proper divisors (279717694963).

1212110011021 is a wasteful number, since it uses less digits than its factorization.

1212110011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13319890251.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212110011021 its reverse (1201100112121), we get a palindrome (2413210123142).

The spelling of 1212110011021 in words is "one trillion, two hundred twelve billion, one hundred ten million, eleven thousand, twenty-one".