1020001022121 has 16 divisors (see below), whose sum is σ = 1433182677120. Its totient is φ = 643995475200.

The previous prime is 1020001022119. The next prime is 1020001022143. The reversal of 1020001022121 is 1212201000201.

It is not a de Polignac number, because 1020001022121 - 2¹ = 1020001022119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020001022097 and 1020001022106.

It is not an unprimeable number, because it can be changed into a prime (1020001022101) 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, 73174336 + ... + 73188273.

It is an arithmetic number, because the mean of its divisors is an integer number (89573917320).

Almost surely, 2^{1020001022121} is an apocalyptic number.

It is an amenable number.

1020001022121 is a deficient number, since it is larger than the sum of its proper divisors (413181654999).

1020001022121 is a wasteful number, since it uses less digits than its factorization.

1020001022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146362736.

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

Adding to 1020001022121 its reverse (1212201000201), we get a palindrome (2232202022322).

The spelling of 1020001022121 in words is "one trillion, twenty billion, one million, twenty-two thousand, one hundred twenty-one".