20111220202 has 8 divisors (see below), whose sum is σ = 30172513536. Its totient is φ = 10053715692.

The previous prime is 20111220193. The next prime is 20111220211. The reversal of 20111220202 is 20202211102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20111220193) and next prime (20111220211).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20111220202² (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 3 ways as a sum of consecutive naturals, for example, 933898 + ... + 955189.

It is an arithmetic number, because the mean of its divisors is an integer number (3771564192).

Almost surely, 2^20111220202 is an apocalyptic number.

20111220202 is a deficient number, since it is larger than the sum of its proper divisors (10061293334).

20111220202 is a wasteful number, since it uses less digits than its factorization.

20111220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894412.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20111220202 its reverse (20202211102), we get a palindrome (40313431304).

The spelling of 20111220202 in words is "twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred two".