121111112021012 has 12 divisors (see below), whose sum is σ = 211953835484916. Its totient is φ = 60552873311040.

The previous prime is 121111112020991. The next prime is 121111112021149. The reversal of 121111112021012 is 210120211111121.

It can be written as a sum of positive squares in 2 ways, for example, as 55983855559696 + 65127256461316 = 7482236^2 + 8070146^2 .

It is a super-2 number, since 2×121111112021012² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670573289 + ... + 670753872.

It is an arithmetic number, because the mean of its divisors is an integer number (17662819623743).

Almost surely, 2^{121111112021012} is an apocalyptic number.

It is an amenable number.

121111112021012 is a deficient number, since it is larger than the sum of its proper divisors (90842723463904).

121111112021012 is a wasteful number, since it uses less digits than its factorization.

121111112021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341349738 (or 1341349736 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121111112021012 its reverse (210120211111121), we get a palindrome (331231323132133).

The spelling of 121111112021012 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred twelve million, twenty-one thousand, twelve".