20100001211020 has 48 divisors (see below), whose sum is σ = 44589701368800. Its totient is φ = 7589736322560.

The previous prime is 20100001210979. The next prime is 20100001211027. The reversal of 20100001211020 is 2011210000102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20100001210988 and 20100001211006.

It is not an unprimeable number, because it can be changed into a prime (20100001211027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94011975 + ... + 94225534.

It is an arithmetic number, because the mean of its divisors is an integer number (928952111850).

Almost surely, 2^{20100001211020} is an apocalyptic number.

20100001211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100001211020 is an abundant number, since it is smaller than the sum of its proper divisors (24489700157780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20100001211020 is a wasteful number, since it uses less digits than its factorization.

20100001211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188237818 (or 188237816 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20100001211020 its reverse (2011210000102), we get a palindrome (22111211211122).

The spelling of 20100001211020 in words is "twenty trillion, one hundred billion, one million, two hundred eleven thousand, twenty".