1020020220021 has 64 divisors (see below), whose sum is σ = 1578998071296. Its totient is φ = 578851660800.

The previous prime is 1020020220019. The next prime is 1020020220029. The reversal of 1020020220021 is 1200220200201.

It is not a de Polignac number, because 1020020220021 - 2¹ = 1020020220019 is a prime.

It is a super-3 number, since 3×1020020220021³ (a number of 37 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020020219979 and 1020020220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020220029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115083036 + ... + 115091898.

It is an arithmetic number, because the mean of its divisors is an integer number (24671844864).

Almost surely, 2^{1020020220021} is an apocalyptic number.

1020020220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020020220021 is a deficient number, since it is larger than the sum of its proper divisors (558977851275).

1020020220021 is a wasteful number, since it uses less digits than its factorization.

1020020220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9922.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1020020220021 its reverse (1200220200201), we get a palindrome (2220240420222).

The spelling of 1020020220021 in words is "one trillion, twenty billion, twenty million, two hundred twenty thousand, twenty-one".