1020212202121 has 32 divisors (see below), whose sum is σ = 1234479052800. Its totient is φ = 823626714240.

The previous prime is 1020212202089. The next prime is 1020212202127. The reversal of 1020212202121 is 1212022120201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1020212202121 - 2⁵ = 1020212202089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020212202095 and 1020212202104.

It is not an unprimeable number, because it can be changed into a prime (1020212202127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15771981 + ... + 15836533.

It is an arithmetic number, because the mean of its divisors is an integer number (38577470400).

Almost surely, 2^{1020212202121} is an apocalyptic number.

It is an amenable number.

1020212202121 is a deficient number, since it is larger than the sum of its proper divisors (214266850679).

1020212202121 is a wasteful number, since it uses less digits than its factorization.

1020212202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65269.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1020212202121 its reverse (1212022120201), we get a palindrome (2232234322322).

The spelling of 1020212202121 in words is "one trillion, twenty billion, two hundred twelve million, two hundred two thousand, one hundred twenty-one".