1202280020721 has 48 divisors (see below), whose sum is σ = 1936585647360. Its totient is φ = 713657105280.

The previous prime is 1202280020719. The next prime is 1202280020723. The reversal of 1202280020721 is 1270200822021.

It is an interprime number because it is at equal distance from previous prime (1202280020719) and next prime (1202280020723).

It is not a de Polignac number, because 1202280020721 - 2¹ = 1202280020719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1202280020723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3326340 + ... + 3670026.

It is an arithmetic number, because the mean of its divisors is an integer number (40345534320).

Almost surely, 2^{1202280020721} is an apocalyptic number.

It is an amenable number.

1202280020721 is a deficient number, since it is larger than the sum of its proper divisors (734305626639).

1202280020721 is a wasteful number, since it uses less digits than its factorization.

1202280020721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344766 (or 344763 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

Adding to 1202280020721 its reverse (1270200822021), we get a palindrome (2472480842742).

The spelling of 1202280020721 in words is "one trillion, two hundred two billion, two hundred eighty million, twenty thousand, seven hundred twenty-one".