111212021021000 has 64 divisors (see below), whose sum is σ = 260238791245680. Its totient is φ = 44484353356800.

The previous prime is 111212021020999. The next prime is 111212021021027. The reversal of 111212021021000 is 120120212111.

It can be written as a sum of positive squares in 8 ways, for example, as 597538276036 + 110614482744964 = 773006^2 + 10517342^2 .

It is a super-2 number, since 2×111212021021000² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107498192 + ... + 108527808.

Almost surely, 2^{111212021021000} is an apocalyptic number.

111212021021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212021021000 is an abundant number, since it is smaller than the sum of its proper divisors (149026770224680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111212021021000 is a wasteful number, since it uses less digits than its factorization.

111212021021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137651 (or 1137637 counting only the distinct ones).

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

Adding to 111212021021000 its reverse (120120212111), we get a palindrome (111332141233111).

The spelling of 111212021021000 in words is "one hundred eleven trillion, two hundred twelve billion, twenty-one million, twenty-one thousand".