20111221202 has 16 divisors (see below), whose sum is σ = 30471787224. Its totient is φ = 9954000000.

The previous prime is 20111221199. The next prime is 20111221219. The reversal of 20111221202 is 20212211102.

It can be written as a sum of positive squares in 4 ways, for example, as 19973886241 + 137334961 = 141329^2 + 11719^2 .

It is a super-2 number, since 2×20111221202² (a number of 21 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, 1589702 + ... + 1602302.

Almost surely, 2^20111221202 is an apocalyptic number.

20111221202 is a deficient number, since it is larger than the sum of its proper divisors (10360566022).

20111221202 is a wasteful number, since it uses less digits than its factorization.

20111221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20605.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20111221202 its reverse (20212211102), we get a palindrome (40323432304).

The spelling of 20111221202 in words is "twenty billion, one hundred eleven million, two hundred twenty-one thousand, two hundred two".