101211101020 has 12 divisors (see below), whose sum is σ = 212543312184. Its totient is φ = 40484440400.

The previous prime is 101211101011. The next prime is 101211101029. The reversal of 101211101020 is 20101112101.

It is an interprime number because it is at equal distance from previous prime (101211101011) and next prime (101211101029).

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 = 101211100988 and 101211101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211101029) 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, 2530277506 + ... + 2530277545.

It is an arithmetic number, because the mean of its divisors is an integer number (17711942682).

Almost surely, 2^101211101020 is an apocalyptic number.

101211101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101211101020 is an abundant number, since it is smaller than the sum of its proper divisors (111332211164).

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

101211101020 is a wasteful number, since it uses less digits than its factorization.

101211101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060555060 (or 5060555058 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 101211101020 its reverse (20101112101), we get a palindrome (121312213121).

The spelling of 101211101020 in words is "one hundred one billion, two hundred eleven million, one hundred one thousand, twenty".