20111212221002 has 32 divisors (see below), whose sum is σ = 34659156178944. Its totient is φ = 8573398819200.

The previous prime is 20111212220977. The next prime is 20111212221011. The reversal of 20111212221002 is 20012221211102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41583608 + ... + 42064460.

It is an arithmetic number, because the mean of its divisors is an integer number (1083098630592).

Almost surely, 2^{20111212221002} is an apocalyptic number.

20111212221002 is a deficient number, since it is larger than the sum of its proper divisors (14547943957942).

20111212221002 is a wasteful number, since it uses less digits than its factorization.

20111212221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496694.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20111212221002 its reverse (20012221211102), we get a palindrome (40123433432104).

The spelling of 20111212221002 in words is "twenty trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, two".