20001211021012 has 24 divisors (see below), whose sum is σ = 37714780109216. Its totient is φ = 9226383647328.

The previous prime is 20001211021003. The next prime is 20001211021031. The reversal of 20001211021012 is 21012011210002.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20001211020983 and 20001211021001.

It is a congruent number.

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, 102912738 + ... + 103106905.

Almost surely, 2^{20001211021012} is an apocalyptic number.

It is an amenable number.

20001211021012 is a deficient number, since it is larger than the sum of its proper divisors (17713569088204).

20001211021012 is a wasteful number, since it uses less digits than its factorization.

20001211021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206021527 (or 206021525 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001211021012 its reverse (21012011210002), we get a palindrome (41013222231014).

The spelling of 20001211021012 in words is "twenty trillion, one billion, two hundred eleven million, twenty-one thousand, twelve".