10101212020 has 12 divisors (see below), whose sum is σ = 21212545284. Its totient is φ = 4040484800.

The previous prime is 10101211951. The next prime is 10101212027. The reversal of 10101212020 is 2021210101.

It can be written as a sum of positive squares in 2 ways, for example, as 1490114404 + 8611097616 = 38602^2 + 92796^2 .

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 = 10101211988 and 10101212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101212027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252530281 + ... + 252530320.

It is an arithmetic number, because the mean of its divisors is an integer number (1767712107).

Almost surely, 2^10101212020 is an apocalyptic number.

10101212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101212020 is an abundant number, since it is smaller than the sum of its proper divisors (11111333264).

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

10101212020 is a wasteful number, since it uses less digits than its factorization.

10101212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505060610 (or 505060608 counting only the distinct ones).

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

Adding to 10101212020 its reverse (2021210101), we get a palindrome (12122422121).

The spelling of 10101212020 in words is "ten billion, one hundred one million, two hundred twelve thousand, twenty".