1021002120010 has 8 divisors (see below), whose sum is σ = 1837803816036. Its totient is φ = 408400848000.

The previous prime is 1021002119959. The next prime is 1021002120013. The reversal of 1021002120010 is 100212001201.

It can be written as a sum of positive squares in 2 ways, for example, as 1002243256641 + 18758863369 = 1001121^2 + 136963^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 102100212001 = 1021002120010 / (1 + 0 + 2 + 1 + 0 + 0 + 2 + 1 + 2 + 0 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (1021002120013) 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, 51050105991 + ... + 51050106010.

Almost surely, 2^{1021002120010} is an apocalyptic number.

1021002120010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021002120010 is a deficient number, since it is larger than the sum of its proper divisors (816801696026).

1021002120010 is a wasteful number, since it uses less digits than its factorization.

1021002120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102100212008.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1021002120010 its reverse (100212001201), we get a palindrome (1121214121211).

The spelling of 1021002120010 in words is "one trillion, twenty-one billion, two million, one hundred twenty thousand, ten".