1021155202150 has 48 divisors (see below), whose sum is σ = 1982869851600. Its totient is φ = 390758981760.

The previous prime is 1021155202129. The next prime is 1021155202153. The reversal of 1021155202150 is 512025511201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021155202153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3072432 + ... + 3388531.

It is an arithmetic number, because the mean of its divisors is an integer number (41309788575).

Almost surely, 2^{1021155202150} is an apocalyptic number.

1021155202150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021155202150 is a deficient number, since it is larger than the sum of its proper divisors (961714649450).

1021155202150 is a wasteful number, since it uses less digits than its factorization.

1021155202150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461113 (or 6461108 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 1021155202150 in words is "one trillion, twenty-one billion, one hundred fifty-five million, two hundred two thousand, one hundred fifty".