1121210222121 has 32 divisors (see below), whose sum is σ = 1890842019840. Its totient is φ = 649976936400.

The previous prime is 1121210222113. The next prime is 1121210222123. The reversal of 1121210222121 is 1212220121211.

1121210222121 is a `hidden beast` number, since 112 + 1 + 210 + 222 + 121 = 666.

It is not a de Polignac number, because 1121210222121 - 2³ = 1121210222113 is a prime.

It is a super-2 number, since 2×1121210222121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121210222094 and 1121210222103.

It is not an unprimeable number, because it can be changed into a prime (1121210222123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82060965 + ... + 82074626.

It is an arithmetic number, because the mean of its divisors is an integer number (59088813120).

Almost surely, 2^{1121210222121} is an apocalyptic number.

1121210222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121210222121 is a deficient number, since it is larger than the sum of its proper divisors (769631797719).

1121210222121 is a wasteful number, since it uses less digits than its factorization.

1121210222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164135634 (or 164135628 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121210222121 its reverse (1212220121211), we get a palindrome (2333430343332).

The spelling of 1121210222121 in words is "one trillion, one hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".