10100121221020 has 24 divisors (see below), whose sum is σ = 21211788675168. Its totient is φ = 4039756276800.

The previous prime is 10100121221017. The next prime is 10100121221023. The reversal of 10100121221020 is 2012212100101.

It is an interprime number because it is at equal distance from previous prime (10100121221017) and next prime (10100121221023).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100121221023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17979691 + ... + 18532930.

It is an arithmetic number, because the mean of its divisors is an integer number (883824528132).

Almost surely, 2^{10100121221020} is an apocalyptic number.

10100121221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10100121221020 is an abundant number, since it is smaller than the sum of its proper divisors (11111667454148).

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

10100121221020 is a wasteful number, since it uses less digits than its factorization.

10100121221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36526461 (or 36526459 counting only the distinct ones).

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

Adding to 10100121221020 its reverse (2012212100101), we get a palindrome (12112333321121).

The spelling of 10100121221020 in words is "ten trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty".