1021203123102 has 12 divisors (see below), whose sum is σ = 2212606766760. Its totient is φ = 340401041028.

The previous prime is 1021203123049. The next prime is 1021203123103. The reversal of 1021203123102 is 2013213021201.

1021203123102 is a `hidden beast` number, since 1 + 0 + 21 + 20 + 312 + 310 + 2 = 666.

It is a super-2 number, since 2×1021203123102² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 56733506839 = 1021203123102 / (1 + 0 + 2 + 1 + 2 + 0 + 3 + 1 + 2 + 3 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021203123103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28366753402 + ... + 28366753437.

It is an arithmetic number, because the mean of its divisors is an integer number (184383897230).

Almost surely, 2^{1021203123102} is an apocalyptic number.

1021203123102 is an abundant number, since it is smaller than the sum of its proper divisors (1191403643658).

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

1021203123102 is a wasteful number, since it uses less digits than its factorization.

1021203123102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56733506847 (or 56733506844 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1021203123102 its reverse (2013213021201), we get a palindrome (3034416144303).

The spelling of 1021203123102 in words is "one trillion, twenty-one billion, two hundred three million, one hundred twenty-three thousand, one hundred two".