1021020002121 has 16 divisors (see below), whose sum is σ = 1593787321728. Its totient is φ = 569209756800.

The previous prime is 1021020002077. The next prime is 1021020002153. The reversal of 1021020002121 is 1212000201201.

It is not a de Polignac number, because 1021020002121 - 2¹⁸ = 1021019739977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021020002097 and 1021020002106.

It is not an unprimeable number, because it can be changed into a prime (1021020003121) 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, 592925970 + ... + 592927691.

It is an arithmetic number, because the mean of its divisors is an integer number (99611707608).

Almost surely, 2^{1021020002121} is an apocalyptic number.

It is an amenable number.

1021020002121 is a deficient number, since it is larger than the sum of its proper divisors (572767319607).

1021020002121 is a wasteful number, since it uses less digits than its factorization.

1021020002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185853712.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021020002121 its reverse (1212000201201), we get a palindrome (2233020203322).

The spelling of 1021020002121 in words is "one trillion, twenty-one billion, twenty million, two thousand, one hundred twenty-one".