101211201121020 has 24 divisors (see below), whose sum is σ = 283391363139024. Its totient is φ = 26989653632256.

The previous prime is 101211201121007. The next prime is 101211201121067. The reversal of 101211201121020 is 20121102112101.

It is a happy number.

It is a super-3 number, since 3×101211201121020³ (a number of 43 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 843426675949 + ... + 843426676068.

It is an arithmetic number, because the mean of its divisors is an integer number (11807973464126).

Almost surely, 2^{101211201121020} is an apocalyptic number.

101211201121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101211201121020 is an abundant number, since it is smaller than the sum of its proper divisors (182180162018004).

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

101211201121020 is a wasteful number, since it uses less digits than its factorization.

101211201121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686853352029 (or 1686853352027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101211201121020 its reverse (20121102112101), we get a palindrome (121332303233121).

The spelling of 101211201121020 in words is "one hundred one trillion, two hundred eleven billion, two hundred one million, one hundred twenty-one thousand, twenty".