1021000101197 has 16 divisors (see below), whose sum is σ = 1049504754480. Its totient is φ = 992939212800.

The previous prime is 1021000101167. The next prime is 1021000101217. The reversal of 1021000101197 is 7911010001201.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 34178395876 + 986821705321 = 184874^2 + 993389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021000101197 - 2²⁰ = 1020999052621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021000101167) 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, 1642829 + ... + 2177357.

It is an arithmetic number, because the mean of its divisors is an integer number (65594047155).

Almost surely, 2^{1021000101197} is an apocalyptic number.

It is an amenable number.

1021000101197 is a deficient number, since it is larger than the sum of its proper divisors (28504653283).

1021000101197 is a wasteful number, since it uses less digits than its factorization.

1021000101197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534944.

The product of its (nonzero) digits is 126, while the sum is 23.

Adding to 1021000101197 its reverse (7911010001201), we get a palindrome (8932010102398).

The spelling of 1021000101197 in words is "one trillion, twenty-one billion, one hundred one thousand, one hundred ninety-seven".