20121122211985 has 8 divisors (see below), whose sum is σ = 24146994551400. Its totient is φ = 16095799171584.

The previous prime is 20121122211877. The next prime is 20121122212021. The reversal of 20121122211985 is 58911222112102.

It can be written as a sum of positive squares in 4 ways, for example, as 4203479957121 + 15917642254864 = 2050239^2 + 3989692^2 .

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 20121122211985 - 2³³ = 20112532277393 is a prime.

It is a super-2 number, since 2×20121122211985² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137244160 + ... + 137390689.

It is an arithmetic number, because the mean of its divisors is an integer number (3018374318925).

Almost surely, 2^{20121122211985} is an apocalyptic number.

It is an amenable number.

20121122211985 is a deficient number, since it is larger than the sum of its proper divisors (4025872339415).

20121122211985 is a wasteful number, since it uses less digits than its factorization.

20121122211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274649507.

The product of its (nonzero) digits is 11520, while the sum is 37.

The spelling of 20121122211985 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred eighty-five".