20111121010210 has 8 divisors (see below), whose sum is σ = 36200017818396. Its totient is φ = 8044448404080.

The previous prime is 20111121010103. The next prime is 20111121010361. The reversal of 20111121010210 is 1201012111102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19562035564201 + 549085446009 = 4422899^2 + 741003^2 .

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

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, 1005556050501 + ... + 1005556050520.

Almost surely, 2^{20111121010210} is an apocalyptic number.

20111121010210 is a deficient number, since it is larger than the sum of its proper divisors (16088896808186).

20111121010210 is a wasteful number, since it uses less digits than its factorization.

20111121010210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011112101028.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20111121010210 its reverse (1201012111102), we get a palindrome (21312133121312).

The spelling of 20111121010210 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-one million, ten thousand, two hundred ten".